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基本的界面，可以进行组件的拖拽

master
鹏鹏 李 3 days ago
commit
0a6c228ec2
12 changed files with 749 additions and 0 deletions
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  1. +35
    -0
      editor.pro
  2. +320
    -0
      editor.pro.user
  3. +33
    -0
      item.cpp
  4. +22
    -0
      item.h
  5. +17
    -0
      main.cpp
  6. +107
    -0
      mainwindow.cpp
  7. +29
    -0
      mainwindow.h
  8. +62
    -0
      mainwindow.ui
  9. +63
    -0
      mygraphicsview.cpp
  10. +24
    -0
      mygraphicsview.h
  11. +6
    -0
      mylistwidget.cpp
  12. +31
    -0
      mylistwidget.h

+ 35
- 0
editor.pro View File

@@ -0,0 +1,35 @@
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
item.cpp \
main.cpp \
mainwindow.cpp \
mygraphicsview.cpp

HEADERS += \
item.h \
mainwindow.h \
mygraphicsview.h

FORMS += \
mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

+ 320
- 0
editor.pro.user View File

@@ -0,0 +1,320 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE QtCreatorProject>
<!-- Written by QtCreator 4.11.1, 2025-08-05T20:13:55. -->
<qtcreator>
<data>
<variable>EnvironmentId</variable>
<value type="QByteArray">{1084213a-f698-4faa-95c4-704b6a0911a5}</value>
</data>
<data>
<variable>ProjectExplorer.Project.ActiveTarget</variable>
<value type="int">0</value>
</data>
<data>
<variable>ProjectExplorer.Project.EditorSettings</variable>
<valuemap type="QVariantMap">
<value type="bool" key="EditorConfiguration.AutoIndent">true</value>
<value type="bool" key="EditorConfiguration.AutoSpacesForTabs">false</value>
<value type="bool" key="EditorConfiguration.CamelCaseNavigation">true</value>
<valuemap type="QVariantMap" key="EditorConfiguration.CodeStyle.0">
<value type="QString" key="language">Cpp</value>
<valuemap type="QVariantMap" key="value">
<value type="QByteArray" key="CurrentPreferences">CppGlobal</value>
</valuemap>
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<value type="QString" key="language">QmlJS</value>
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</valuemap>
</valuemap>
<value type="int" key="EditorConfiguration.CodeStyle.Count">2</value>
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<value type="bool" key="EditorConfiguration.ConstrainTooltips">false</value>
<value type="int" key="EditorConfiguration.IndentSize">4</value>
<value type="bool" key="EditorConfiguration.KeyboardTooltips">false</value>
<value type="int" key="EditorConfiguration.MarginColumn">80</value>
<value type="bool" key="EditorConfiguration.MouseHiding">true</value>
<value type="bool" key="EditorConfiguration.MouseNavigation">true</value>
<value type="int" key="EditorConfiguration.PaddingMode">1</value>
<value type="bool" key="EditorConfiguration.ScrollWheelZooming">true</value>
<value type="bool" key="EditorConfiguration.ShowMargin">false</value>
<value type="int" key="EditorConfiguration.SmartBackspaceBehavior">0</value>
<value type="bool" key="EditorConfiguration.SmartSelectionChanging">true</value>
<value type="bool" key="EditorConfiguration.SpacesForTabs">true</value>
<value type="int" key="EditorConfiguration.TabKeyBehavior">0</value>
<value type="int" key="EditorConfiguration.TabSize">8</value>
<value type="bool" key="EditorConfiguration.UseGlobal">true</value>
<value type="int" key="EditorConfiguration.Utf8BomBehavior">1</value>
<value type="bool" key="EditorConfiguration.addFinalNewLine">true</value>
<value type="bool" key="EditorConfiguration.cleanIndentation">true</value>
<value type="bool" key="EditorConfiguration.cleanWhitespace">true</value>
<value type="bool" key="EditorConfiguration.inEntireDocument">false</value>
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+ 33
- 0
item.cpp View File

@@ -0,0 +1,33 @@
#include "item.h"
#include <QPainter>
#include <QStyleOptionGraphicsItem>

Item::Item(const QString &type, QGraphicsItem *parent)
: QGraphicsObject(parent), type_(type)
{
if (type == "常开") color_ = Qt::blue;
else if (type == "常闭") color_ = Qt::red;
else if (type == "比较指令") color_ = Qt::green;
else color_ = Qt::darkYellow;

setFlags(QGraphicsItem::ItemIsMovable |
QGraphicsItem::ItemIsSelectable |
QGraphicsItem::ItemSendsGeometryChanges);
}

QRectF Item::boundingRect() const
{
return QRectF(0, 0, 80, 40);
}

void Item::paint(QPainter *painter,
const QStyleOptionGraphicsItem *,
QWidget *)
{
painter->setBrush(color_.lighter(150));
painter->setPen(QPen(color_, 2));
painter->drawRoundedRect(boundingRect(), 5, 5);

painter->setPen(Qt::black);
painter->drawText(boundingRect(), Qt::AlignCenter, type_);
}

+ 22
- 0
item.h View File

@@ -0,0 +1,22 @@
#ifndef ITEM_H
#define ITEM_H

#include <QGraphicsObject>

class Item : public QGraphicsObject
{
Q_OBJECT
public:
explicit Item(const QString &type, QGraphicsItem *parent = nullptr);

QRectF boundingRect() const override;
void paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget) override;

private:
QString type_;
QColor color_;
};

#endif // ITEM_H

+ 17
- 0
main.cpp View File

@@ -0,0 +1,17 @@
#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);

// 设置应用程序信息
QApplication::setApplicationName("PLC梯形图编辑器");
QApplication::setApplicationVersion("1.0");

MainWindow w;
w.resize(1000, 600);
w.show();

return a.exec();
}

+ 107
- 0
mainwindow.cpp View File

@@ -0,0 +1,107 @@
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "item.h"

#include <QListWidgetItem>
#include <QMimeData>
#include <QDrag>
#include <QPainter>
#include <QMouseEvent>
#include <QDropEvent>
#include <QGraphicsView>

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);

/* 1. 场景 */
m_scene = new QGraphicsScene(this);
ui->graphicsView->setScene(m_scene);
ui->graphicsView->setRenderHint(QPainter::Antialiasing);
ui->graphicsView->setSceneRect(0, 0, 800, 600);
ui->graphicsView->setAcceptDrops(true);
ui->graphicsView->setFocus();

/* 2. 列表 */
ui->listWidget->setViewMode(QListView::IconMode);
ui->listWidget->setIconSize(QSize(60, 30));
ui->listWidget->setDragEnabled(false);
ui->listWidget->viewport()->installEventFilter(this);

/* 3. 填充列表 */
createComponents();
}

MainWindow::~MainWindow()
{
delete ui;
}

/* ---------- 拖拽核心 ---------- */
bool MainWindow::eventFilter(QObject *obj, QEvent *event)
{
if (obj == ui->listWidget->viewport()) {
static QListWidgetItem *dragItem = nullptr;
static QPoint startPos;

if (event->type() == QEvent::MouseButtonPress) {
auto *me = static_cast<QMouseEvent*>(event);
if (me->button() == Qt::LeftButton) {
dragItem = ui->listWidget->itemAt(me->pos());
startPos = me->pos();
}
} else if (event->type() == QEvent::MouseMove && dragItem) {
auto *me = static_cast<QMouseEvent*>(event);
if ((me->pos() - startPos).manhattanLength()
>= QApplication::startDragDistance()) {

QString type = dragItem->data(Qt::UserRole).toString();

QMimeData *mime = new QMimeData;
mime->setData("application/x-component", type.toUtf8());

QDrag *drag = new QDrag(this);
drag->setMimeData(mime);
drag->setPixmap(dragItem->icon().pixmap(ui->listWidget->iconSize()));
drag->setHotSpot(drag->pixmap().rect().center());
drag->exec(Qt::CopyAction);

dragItem = nullptr;
}
} else if (event->type() == QEvent::MouseButtonRelease) {
dragItem = nullptr;
}
}
return QMainWindow::eventFilter(obj, event);
}

/* ---------- 填充列表 ---------- */
void MainWindow::createComponents()
{
struct Comp { QString name; QColor color; };
const QVector<Comp> comps = {
{"常开", Qt::blue},
{"常闭", Qt::red},
{"比较指令", Qt::green},
{"线圈", Qt::darkYellow}
};

for (const Comp &c : comps) {
QListWidgetItem *it = new QListWidgetItem(c.name, ui->listWidget);

QPixmap pix(60, 30);
pix.fill(Qt::white);
QPainter p(&pix);
p.setRenderHint(QPainter::Antialiasing);
p.setBrush(c.color.lighter(150));
p.setPen(QPen(c.color, 2));
p.drawRoundedRect(QRect(5, 5, 50, 20), 3, 3);
p.setPen(Qt::black);
p.drawText(QRect(5, 5, 50, 20), Qt::AlignCenter, c.name);

it->setIcon(QIcon(pix));
it->setData(Qt::UserRole, c.name);
}
}

+ 29
- 0
mainwindow.h View File

@@ -0,0 +1,29 @@
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
class QGraphicsScene;
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = nullptr);
~MainWindow();

protected:
bool eventFilter(QObject *obj, QEvent *event) override;

private:
void createComponents();

Ui::MainWindow *ui;
QGraphicsScene *m_scene;
};

#endif // MAINWINDOW_H

+ 62
- 0
mainwindow.ui View File

@@ -0,0 +1,62 @@
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>1101</width>
<height>656</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QListWidget" name="listWidget">
<property name="geometry">
<rect>
<x>20</x>
<y>10</y>
<width>161</width>
<height>381</height>
</rect>
</property>
</widget>
<widget class="MyGraphicsView" name="graphicsView">
<property name="geometry">
<rect>
<x>210</x>
<y>10</y>
<width>791</width>
<height>381</height>
</rect>
</property>
<property name="dragMode">
<enum>QGraphicsView::NoDrag</enum>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>1101</width>
<height>26</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<customwidgets>
<customwidget>
<class>MyGraphicsView</class>
<extends>QGraphicsView</extends>
<header>mygraphicsview.h</header>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>

+ 63
- 0
mygraphicsview.cpp View File

@@ -0,0 +1,63 @@
#include "mygraphicsview.h"
#include <QMimeData>
#include <QCursor>
#include <QGraphicsScene>
#include <QDebug>

MyGraphicsView::MyGraphicsView(QWidget *parent)
: QGraphicsView(parent)
{
setAcceptDrops(true);
viewport()->setAcceptDrops(true);
setRenderHint(QPainter::Antialiasing);
setFocusPolicy(Qt::StrongFocus); // 让view能接收键盘事件
}

void MyGraphicsView::dragEnterEvent(QDragEnterEvent *event)
{
if (event->mimeData()->hasFormat("application/x-component"))
event->acceptProposedAction();
else
event->ignore();
}

void MyGraphicsView::dragMoveEvent(QDragMoveEvent *event)
{
if (event->mimeData()->hasFormat("application/x-component"))
event->acceptProposedAction();
else
event->ignore();
}

void MyGraphicsView::dropEvent(QDropEvent *event)
{
if (!event->mimeData()->hasFormat("application/x-component")) {
event->ignore();
return;
}

QString type = QString::fromUtf8(event->mimeData()->data("application/x-component"));

QPointF scenePos = mapToScene(event->pos());
Item *item = new Item(type);
item->setPos(scenePos);

if (scene())
scene()->addItem(item);

event->acceptProposedAction();
}

void MyGraphicsView::keyPressEvent(QKeyEvent *event)
{
if (event->key() == Qt::Key_Delete && scene()) {
// 删除所有被选中的图元
QList<QGraphicsItem*> selectedItems = scene()->selectedItems();
for (QGraphicsItem* item : selectedItems) {
scene()->removeItem(item);
delete item;
}
} else {
QGraphicsView::keyPressEvent(event);
}
}

+ 24
- 0
mygraphicsview.h View File

@@ -0,0 +1,24 @@
#ifndef MYGRAPHICSVIEW_H
#define MYGRAPHICSVIEW_H

#include <QGraphicsView>
#include <QDropEvent>
#include <QDragEnterEvent>
#include <QMimeData>
#include <QKeyEvent>
#include "item.h"

class MyGraphicsView : public QGraphicsView
{
Q_OBJECT
public:
explicit MyGraphicsView(QWidget *parent = nullptr);

protected:
void dragEnterEvent(QDragEnterEvent *event) override;
void dropEvent(QDropEvent *event) override;
void dragMoveEvent(QDragMoveEvent *event) override;
void keyPressEvent(QKeyEvent *event) override;
};

#endif // MYGRAPHICSVIEW_H

+ 6
- 0
mylistwidget.cpp View File

@@ -0,0 +1,6 @@
#include "mylistwidget.h"

MyListWidget::MyListWidget()
{

}

+ 31
- 0
mylistwidget.h View File

@@ -0,0 +1,31 @@
#ifndef MYLISTWIDGET_H
#define MYLISTWIDGET_H
#include <QDrag>
#include <QListWidget>
#include <QMimeData>

class MyListWidget : public QListWidget {
public:
using QListWidget::QListWidget;

protected:
void startDrag(Qt::DropActions supportedActions) override
{
QListWidgetItem *item = currentItem();
if (!item) return;

QDrag *drag = new QDrag(this);
QMimeData *mimeData = new QMimeData;

QString type = item->data(Qt::UserRole).toString();
mimeData->setData("application/x-component", type.toUtf8());
drag->setMimeData(mimeData);

drag->setPixmap(item->icon().pixmap(iconSize()));
drag->setHotSpot(drag->pixmap().rect().center());

drag->exec(Qt::CopyAction);
}
};

#endif // MYLISTWIDGET_H

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